Metallic packing.



PATENTED NOV. 3, 1903. W. R. EDWARD-S, E. WISC'H & H. N. BRENEMAN.

METALLIC PACKING.

APPLICATION FILED JUNE 1, 1903.

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Ln-nu. wAsHmerou n c No. 743,154. PATENTED NOV. 3, 1903.

W. EDWARD-S, E. WISCH & H. N. BRENEMAN.

METALLIC PACKING. .APPLIOATION FILED JUNE 1, 1903.

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UNITED STATES WILLIAM R. EDWARDS,

racemes November 3, 1903.

{PATENT OFFICE.

METALLIC. PACKING.

SPECIFICATION forming part of Letters Patent N 0. 743,154, datedNovember 3, 1903. Application filed June 1, 1903. Serial No. 159.461.(No model.)

To all whom it 11mg concern:

Be it known that we, WILLIAM R. ED- WARDS, ERNEsT WISCH, and HERBERT N.BRENEMAN, citizens of the United States, residing at Milwaukee, in thecounty of Milwaukee and State of Wisconsin, have invented a new anduseful Improvement in Metallic Packing, of which the following is aspecification.

Our invention relates to an improvement in the class of metallic packingused for prod no: ing fluid-tight joints; and our object is to providean improved construction of such packing for use wherever a fluid-tightjoint is desired, as in connection with a piston-rod or other rod orshaft or a valve-stem, whereby the packing shall as the packing-rings orthe piston-rod or other rod, shaft, or stem become worn be caused tomaintain the required tightness of joint.

Our invention is illustrated in the accompanying drawings, in which-Figure 1 is a vertical longitudinal section of ourimproved packingapplied to a pistonrod shown broken with a portion of the head of acylinder in which it works and the gland and swab-cu p employed; Fig. 2,a broken perspective view of one of the two cup-shaped retaining-ringsemployed; Fig. 3, a similar view of an inner member used with theretainingring shown in Fig, 2 when applied to a piston-rod having anexpanded outer end; Fig. 4, a similar View of the other of the twocupshaped retaining-rings employed; Fig. '5, a similar view of the innermember used with the retaining-ring shown in Fig. 4 when applied to apiston rod having an expanded outer end; Fig. 6, a perspective view ofone of the two outer packing-rings formed of a plurality of segmentalsections with spaces between the ends of the segments; Fig. 7, a likeView of the other similarly-constructed outer packing-ring, and Fig. 8 alike view of the similarly-constructed intermediate packing-ring.

A denotes a piston-rod, in connection with which we have chosen toillustrate our improved metallic packing, though it will be understoodthat We likewise intend it for application to any other rod, shaft, orstem on the rod progresses.

which is required to be rendered tight against fluid-pressure bypacking.

AtB is represented a cylinder-head,through which the piston-rod works,provided with a tubular housing B", containing a bushing b, within whicha coiled spring a is confined for a purpose hereinafter explained. Thepistonrod shown has an expanded outer end, as represented at 0, adjacentto which it is surrounded by a swab-cup G of any known or desiredconstruction, and adjacent to the swabcup the rod is surrounded by asuitable gland D, secured to the cylinder-head in theusual manner andthe internal diameter of which is such as to adapt it to be passed overthe expanded end of the rod.

- At E, F, and G are shown the packing-rings composed of suitablepacking metal, such as Babbitt metal. Each ring is formed of apluralityof arc-shaped sections or segments, preferably three in number, eachsegment of the outer rings E and G being provided in its inner side witha recess d, having parallel sides, or of V shape with the smaller end inward and each segment of the intermediate ring F being provided withlugs at, projecting coincidently from its opposite sides.

These rings are adjusted fiatwise together about the rod A in the orderrepresented,

with the lugs d entering recesses d in the segments of the outer orflanking rings. The

relative positions of the lugs and recesses, the engagement of whichwith each other interlocks the rings to unite them, are such as tomaintain the segments of each ring endwise separated to form betweenthem a space lubricant-holders and allowing the rings to close up aboutthe rod as wear on them and The three rings E, F, and G form, in effect,a single packingring composed of three annular sections, each comprisinga plurality of segmental sections spaced apart at adjacent ends. Aportion of the outer surface of the ring E is shown rounded incross-section at U in Fig. 1 to describe, preferably, the paraboliccurve represented. Across the remainder of this ring and the in- .e,which is lapped in break-joint manner by asegment of an adjacent ring,the spaces serving the twofold purpose of afiording termediate ring Fand extending slightly beyond the adjacent edge of the ring G theirsurfaces are flattened and oblique, as shown at v, to describe a linetangential to the parabola at 1;, and the cross-sectional shape of theremainder of the outersurface of the ring G is that of the, arc of acircle or rounded, as shown at 42 The packing-rings are held to the rodby the cup-shaped retaining-rings H and I. The inner surface of the ringH, in advance of a shoulder f thereon, is concavedin cross-section atif, Fig. 1, to conform to the shape of the surface at that point of thering E, and it extends therefrom to conform to the line 0 of the tangentsufficiently far over the three packing-rings to cover the two jointsformed between them. The inner surface of the retaining-ring I isconcaved in cross-section at its mouth to conform to the shape of thering G, against which it bears, and the ring I is provided'on its endnearest the cylinder with a tubular extension f, forming an internalannular shoulder-f. When the rod or other object to be packed has theexpanded outerend referred to,each retainingring to pass over itforadjustment into place, must have an internal diameter greater thanthe diameter of such object, and under these conditions to cause theretaining-rings to lit the body thereof a suitable filling is required.Accordingly we form each retaining-ring of two concentric annular parts,employing as filling for the respective outer rings the inner rings Hand I, each formed of at least two arc-shaped sections, as represented,and fitting against the shouldered portions within the outer rings. Theface of the ring H conforms to the curve '1) of the portion of thepacking-ring E against which it bears, and the face of the ring Iconforms to the curve 22 of the portion of the packing ring G againstwhich it bears. We prefer to form the ring H of cast-iron and thefilling H of brass. of brass or other suitable metal. The packing andretaining rings are held against the rodby the force of the spring a andtheir abutment at the ring H against an annulus of soft metalliccomposition or other suitable packing K, let into a recess of suitableshape for confining it, formed in the inner corner of the gland D toproject beyond its surface and bear against the outer face of theadjacent retaining-ring, thereby forming in conjunction therewith atight steam and water joint.

The primary purpose of the described formation of the peripheries of thepacking-rings is to prevent motion between them and the retaining-cupsand as the packing wears to cause the circular line at the point oftangency always to form a tight steam or water joint by graduallyconforming to the parabolic curve as the packing wears. By reason of thedescribed formation the outer surface of the packing-rings wears againstthe correspondingly-concaved surfaces of the retaining-rings, and as thesteam pressure in the The rings I and I may be both formed chamber ofthe cylinder-head, aided by the spring a, presses against the ring I thepacking-rings are forced both outward and downward, thereby tending tomaintain them always tight againstthe gland D and tight on the rod A andallowing vibration to take place where the cast cup-shapedretaining-ring H is pressed against the soft metallic packingcomposition K without causing the wearingsurface of the packing-rings toleave the rod. As will be understood, constant vibration of a rod orshaft tends to wear the joint to a face and to insure a tight fit.

While the various particular details herein shown and described producethe best construction now known to us in which to embody onrimprovement, we do not intend to limit our invention to such details, asthey may be variously modified without departure from the spirit of theinvention as defined in the appended claims.

That we claim as new, and desire to secure by Letters Patent, is-

1. In a metallic packing, the combination of a series of unitedpacking-rings having the periphery convexly curved in cross-section atits outer sides, and retaining rings at opposite sides of said series ofpacking-rings concaved to conform to the curved portion of said serieswhere they bear against the same to hold said packing-rings to thewearingsurface.

2. In a metallic packing, the combination of a series of packing-ringshaving the periphery convexly curved in cross-section at its outersides, each of said rings comprising a plurality of segmental sectionsinterlocking from one ring to another to maintain apart the sections ofeach ring and form spaces between the adjacent ends of said sectionslapped by segments of the ring adjacent thereto, and retaining-rings atopposite sides of said series of packing-rings concaved to conform tothe curved portion of said series where they bear against the same tohold said packing-rings to the wearing-surface.

3. In a metallic packing, the combination of a series of packin g-rin gshaving the periphery convexly curved in cross-section at its outersides, each" of said rings comprising at least three segmental sectionswith a recess in the side of each section of one or more of the ringsand lugs projecting from the sides of the other ring or rings to entersaid recesses and interlock the rings and maintain apart the sections ofeach to form spaces between their adjacent ends lapped by segments ofthe ring adjacent thereto, and retaining-rings at opposite sides of saidseries of packing-rings, concaved to conform to the curved portion ofsaid series where they bear against the same to hold the packing-ringsto the wearing-surface.

4. In a metallic packing, the combination of a series of unitedpacking-rings having the periphery convexly curved in cross-section atits outer sides and the portion of the periphery between said curvedsides forming, in cross-section, a line extending across the jointsbetween the several rings in said series, tangential to the paraboladescribed by the curve at one said outer side, a packingring at one sideof said series conforming to the parabolic curve and tangential lineextending therefrom on the portion of said periphery against which itbears, and a retaining-ring conforming to the opposite curved portion ofsaid periphery against-which it bears.

5. In a metallic packing, the combination with a series of interlockingsectional packing-rings forming spaces between the sections, andretaining-rings at opposite sides of said series for holding saidpacking-rings to the wearing-surface, of a gland containing a softmetallic composition packing bearing against the outer retaining-ring.

6. In a metallic packing, the combination with a series of interlockingsectional pack-l ing-rings forming spaces between the sections, ofretaining-rings at opposite sides of said series for holding saidpacking-rings to the wearing-surface, each said retaining-ringcomprising an outer ring and an inner sectional ring seating within saidouter ring.

7. A metallic packing comprising, in combination with a rod, or thelike, and a gland thereon, a series of interlocking sectionalpacking-rings forming spaces between the sections, the peripheryof saidseries being convexly curved in cross-section at its outer sides and theintermediate portion of the periphery between said curved sides forming,in cross-section, a line, extending across the joints between theseveral rings in said series, tangential to the parabola described bythe curve at one said outer side, a packing-ring at one side of saidseries conforming to the parabolic curve and tangential line extendingtherefrom on the portion of said periphery against which it bears, aretainingring conforming to the opposite curved portion of saidperiphery against which it bears, a soft metallic composition packing insaid gland bearing against the outer retainingring, and a springconfined against the series of packing-rings and their retaining-rings.

WILLIAM R. EDWARDS. ERNEST WISOH. HERBERT N. BRENEMAN. In presence of-EVERETT G. HART, FRANK P. BROOK.

